To learn web security, kindly find the following courses:
3) Web Security Fundamentals (Edx) (Hands-on)
4) The third week of the Software security course (Coursera) (Conceptual)
5) LiveOverflow Web Hacking (Youtube)
6) Web Hacking 101 (PwnFunction (Youtube))
7) Hacker101 - Introduction (HackerOne (Youtube))
7) Getting Started With Burp (HackerOne (Youtube))
8) PortSwigger Website